/*
 * MIT License
 *
 * Copyright (c) 2020 wen.gu <454727014@qq.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/***************************************************************************
 * Name: internal_impl.h
 *
 * Purpose: some helper internal function  implemenation
 *
 * Developer:
 *   wen.gu , 2021-05-10
 *
 * TODO:
 *
 ***************************************************************************/

/******************************************************************************
 **    INCLUDES
 ******************************************************************************/
#ifndef __INTERNAL_IMPL_H__
#define __INTERNAL_IMPL_H__

#include <stdint.h>
#include <functional>
#include <vector>
#include <memory>
/******************************************************************************
 **    MACROS
 ******************************************************************************/

//#define 
/******************************************************************************
 **    TYPE DEFINITIONS
 ******************************************************************************/
namespace internal_impl
{
template<size_t sz = 1>
struct enum2Int 
{
    using type = uint8_t;
};

template<>
struct enum2Int<2>
{
    using type = uint16_t;
};

template<>
struct enum2Int<4>
{
    using type = uint32_t;
};

template<>
struct enum2Int<8>
{
    using type = uint64_t;
};


/** for define index sequence */
#if __cplusplus < 201402L   
/**for the case of < c++14 */
template<size_t...>
struct IndexSequence {};

//Expand parameter package by inherit
template<size_t N, size_t... Indexes>
struct MakeIndexSequence : MakeIndexSequence<N - 1, N - 1, Indexes...> {};

// terminate parameter package expanding conditional 
template<size_t... Indexes>
struct MakeIndexSequence<0, Indexes...>
{
    using type = IndexSequence<Indexes...>;
};

template<typename... Args>
using IndexSequenceFor = MakeIndexSequence<sizeof Args...>;
#else
template<size_t... I>
using IndexSequence = std::index_sequence<I...>;

template<size_t N>
using MakeIndexSequence = std::make_integer_sequence<size_t, N>;

template<typename... Args>
using IndexSequenceFor = MakeIndexSequence<sizeof ...(Args)>;

#endif


using Payload = std::vector<uint8_t>;
using PayloadPtr = std::shared_ptr<Payload>;
/******************************************************************************
 **    CLASSES/FUNCTIONS DEFINITIONS
 ******************************************************************************/
/**for expand tuple as function parameters */
template <typename F, typename T, size_t ...I>
inline auto ApplyImpl(F& f, const T& t, IndexSequence<I...>) -> decltype(f(std::get<I>(t)...))
{
    return f(std::get<I>(t)...);
}

template <typename R, typename T, typename... Args>
inline R Apply(R(*funcPtr)(Args...), const T& t)
{
    return ApplyImpl(*funcPtr, t, IndexSequenceFor<Args...>());
}

template <class C, typename R, typename T, typename... Args>
inline R Apply(C* c, R(C::* memFunc)(Args...), const T& t)
{
    auto func = std::bind(memFunc, c);
    return ApplyImpl(func, t, IndexSequenceFor<Args...>());
}

}

#endif /** !__INTERNAL_IMPL_H__ */








